router throughput calculation (in kpps)

[Carlos A. Silva]

hi:

you know how cisco systems advertises throughput numbers for each box that they sell. what's the base-packet size for the calculation?

for example a 2600 is advertised as a 25kpps box. how does cisco get this number? do they use a 64-byte base packet size? is there an average size?

someone told me cisco uses 300byte packets...is this true?

regards,

c.

[dinekal]

hi,

yes its a billion dollar question for long time and still to me. Even from TAC I didn't get the answer. Hope some body should flash some light on this.

Looking forward the reply,

Dinesh.K

[t.baranski · Accepted solution]

64 byte packets are the optimal case for pps because they take the least amount of time to deal with. As such, max pps numbers tend to be calculated with 64 byte packets. I believe I've seen this information on Cisco's site before, so I don't know why TAC couldn't answer.